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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '209a9966f47e61aa162f4ef28f8b741d1a8a80a824889118e6da10722bd6f613' 
  AND token = 'j35uLMOc3+GkKegb4+7U7G4Bq24QX4Kf5YLjmPF8WDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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