SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd88d2afdae15424190059bc722be31fcc3243868a12e8d4a45fc3ee83f33471' 
  AND token = 'RWYqyGJhP6j3IBTNAgwRtuQmJ/jMGpaMxZZJfmrMiOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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