Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5745529f1f00bee3be8daef2ec53cf16b0ff41036d6a857dc2bc59d4cfa21f06' 
  AND token = 'WwI/NjHstY+p8y3Nx5bQ8ZnH0b6HLrXceJC0VL8k78o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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