Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95640aaad33f5298c1c276d2dd78b9efa5cedb9416bd5b2632498a3b62c23a69' 
  AND token = 'PDHw3d0bdjhrrMALm8vhSx4fq4bX7WQrdrWavszsXi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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