Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3c871851db6bc444204022806d4dd90b205400d5ad23aaa167c0286dc514336' 
  AND token = 'wyYID+1JW8xV43tT47NK28y9cDeBRfOFwKi476UKQsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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