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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2f9e4c8c3c9826db876be163ef8e2a3ab858034a9a61aa8c0895c0e742194223' 
  AND token = 'J3A735Bds/HcdSiyDv7J1FW7xfH9BISkoY5hVkEx8P4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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