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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ca8e03eda85fe55d8b1112e2af6e2723fc2ceef1ce52bb76200271089831c798' 
  AND token = 'Mg/50e/6gaAOGXotc7U4P2c+BDXZNzNIULTgPTrzkmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}