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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07fd800962d9d99d97ab755ae7344dcfbb6faba8710a9bee7abaa2ae16a265f2' 
  AND token = '5ckf4MG10BiJzOjfla/ZJlTrFhuSMFTvZVrOaCZE/HA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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