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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4bd7cac897ebc825eede1898edea3848ed66773b32e18078eebf9ee1cbe02b76' 
  AND token = 'wi5NbZUt0/nLqcCpg7IFPP0Caz1T8EFyT14j3PUX6uI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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