Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2c83dcffdd5aacd6696417d6bf2c64fe640ef0bb0cbd7aeb9f4940f552df370' 
  AND token = 'jpQQFjNcHrc7Jy17jlfVhICpAPopw09vvfKChA+goMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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