SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80037ad3271c20891bc969b5124e343d398d3119ff9ad3957b94c9219f0cc876' 
  AND token = 'O0KLmFI9sZQ4Ei0zKG6Gl/V++h5VEoAkcTa6RSlJ888=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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