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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6b7059ce682b8254fec8aeefa5a750d05256d634ca170ff6d8d53f163b97d751' 
  AND token = 'kqk/SFWd+iZFdMZ8D0JHakGa7A2RIKnGucVCxN5mlxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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