Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e48252efdb9f4296315fff06d2bc9bc76c4f9d2da150893db26446bcb99c8084' 
  AND token = 'h603mociljH4e35S/+4QSl2BLTVNWYW0KwpdrDGXPIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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