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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e05464fa36f9a50b3d25bb39adff250e796eaaadcad528c4af39c31558536ab' 
  AND token = 'AtjfNlw0ESnVJ6XUivfooDZObPbPEFXuL+ZBj4c4zAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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