SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4bf6822908a8bfbb66d1de6262e01634f98933ab1f4ccbcd554837051e545fa6' 
  AND token = 'ZmiCLag5P3c2K7FPVCr8uror/Q8YFexNJGS2GTRcvJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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