Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '919ff2c82d3572ef1f978ba64947b7fefcf3bcb2d91d3a63a65eaa031333a7a9' 
  AND token = '9RrvXrKIOMHSkWLVbuR+YB75D0GSOZ2LGxle4yCE2XQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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