Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab5cd11e6e339907f9f4d5b330ddddb5598be579311031141e543ffb1f4b118a' 
  AND token = 'ocKdYPf1wp6hQgIC7R+RWa31cwiC/zE1WtbRFbcAWSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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