Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e25d96739897c0d83b8899d5b0c1456855594ab5e4e76df964c385cae305c1d6' 
  AND token = 'qZvNw0f/0QZRoDEl3d0u66+rS/FlYDOLA0FqMHkSx2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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