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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '484e8872637aee930acd4cade546ef8153080378c5660adcf0137c8cc3ba38ff' 
  AND token = 'Bc1vWiIZ7U92eGzOjdTfIW/RwCTZ/39Vgh1l04JfQV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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