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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c03e9c57b7cbb36484cc3550c07732737cfcda8c59899d6848c8026cb0d2b94c' 
  AND token = 'qXYLnbIL7onirX0wZIt1fllL+pONlmwvY7NoOgTlGRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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