Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8ea99fc232d94bf90d8852c166737b9446876dd388649d801a84a1af0e1a063' 
  AND token = 'KhpIKEYXIQDvfrRKItRlO9ICK6ilsRhNOq0xfsRLViQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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