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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8acd3ca2234c4a69c4076286ce16129e40383a54ebf069bec283ef4779525b9d' 
  AND token = 'zi4D2+EgRXvadtV4jqrlixIK4TmUHabHjRrb/2kkd2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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