Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e0fea5453104ccf413c18a3c7e1a7f29abb8f07a86b7d6e671e11b7f190c0ae' 
  AND token = 'kSCqYQP00c/KPyd+RsI47zqmUbG1pZyUeopBPR+BHCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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