SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72e96625ba5e9e62a7ff04ccd0ab6c9c18e655cb86e293f24f97164c9d2bbe21' 
  AND token = 'G4OK2LkkY7ZnZz9cqQS3JUE0PgdzPyjnt7H0h5pVB4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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