Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcdf75015a2af8e8513a3c855e82ac56f76ad13e93c6aaaa5ef5df89ecb129c5' 
  AND token = 'U+obfWTPNh5/+iWxLS0g5dO+o4vu5akJgRaVyo293O8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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