Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee61812dd33c2248624a47a21ea86203657bd582fb9b29fabea0d8dd172114c8' 
  AND token = 'KuKPWKE7/4sELqIsrCf7QZfemlJxKo52D5b95MCfTzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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