SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0265cc68ef97237903cd9c575562faee531c8f8904071f329151bbc483b0f01e' 
  AND token = 'nvS7MZEK8GFzYGZyYI2eUqB2U5uAw038zeYOHLKuwkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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