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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bda00e2c4115703b7c3913179bc02a35d1eed9cbb64ed8c1a862c82424f6fcf5' 
  AND token = 'PTUSFXaCKwS8cWfOvKAYI+kDKSr6MWmdTWs5DC8KANE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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