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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ca88ce6a611e67e9e2c0c0e2e988e1e7180baf89c0ee9de38a8bc169d3dacd8' 
  AND token = 'Kbj9cnNrH9LCxdWFfqJwv16p+vLOhUHQtN8L3TYPECY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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