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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '49a71d5dbc7706e97a46c6700f1e0341ee7640a8942c0755026280716bad433d' 
  AND token = 'kbnSheR0N6wKQ3C21q/h7ZUWsZXnDLe7yKE3r7Ayywg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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