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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2e04dd6f8a7cad4672ac230b06d55ce6a937554fbca5646578dfa97d5f216c4' 
  AND token = 'kFDaQbFWJLxXnS54vt9h/FKu3mD2fZjwqBmK6fwrhNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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