Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f00bf4248fd9fc38e6610dfe57123b02ff10baf3a506fbeb69f4fcb181ab331f' 
  AND token = 'o5M254BhocaxXCC21AdU4efds4sHnkp4JzeyffKhRU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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