SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69023ccd146df385f0b177233d15891d5813cd6b0e4752f60abdc1a3282e1944' 
  AND token = 'zweVYH1K0GLgGXBg7R5P4qA+8Es2yGcmH8JlfLqcgNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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