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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '538a79f65a66c5e2bfc072f9c508b2c7667c297e97dd87ab51777652e435857e' 
  AND token = 'TfkdGfq8MzBXpaz7W1XAIUOCC1hHIOTB09ot3SdqjBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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