Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c02ba5b4a0a4fb13c136db2d59ba94e312be9d606658f6af40e0e5b66334599c' 
  AND token = 'Z1Ea61oO5AN8jxgNzTiBylb3qrsIL+GtfQ0maKsKxsM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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