Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28eb4f9346ce0579657b4433276ab64f97ef6e2e697350a049c515afc899c23a' 
  AND token = 'lkfrsPLC+V55netX0YokpH1qUpWKfmk768rrOF7Tbrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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