Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe73a2238aa5455c6def7fe1f7f772367dc896a2ef31c1ae16d58ddf9d35fa4e' 
  AND token = 'I9Pscux7ODjdB5rJLJuhEH4x6G5x1MHdu5+tUzzsWE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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