Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00a1a6f25d18a21f15b04696fda6c09433e0c04c4693ab720e4e846226960362' 
  AND token = 'H2kPIU+rrxQ7NA2I06fCYAgnwejgDKF6cETaYoqClwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}