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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ad2eafd0e54affbc5bc7061a1c8fd1bfb49d10a6eeae2322f12c52c9b47cf6e' 
  AND token = 'h6ZK9bJBlgNTrxocTCWHHwdkzP4RTobGquQO0Y8Fh/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}