Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0fa317bba36dd69106318e3f8eeec3d139427ab3a67bb5c10f0e2f9616e1a4d' 
  AND token = '131tEXD5lhW/her5AMFp8WbusiV/NCb0+ujuTYYHafw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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