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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1e17c6824531d5ca758e9cb2cc33ed1810e18e97a0d86f55f26e32b9fe65a0f' 
  AND token = 'lVgzGNRsAR447f09ex0rVIJT3w2eS1JpMF3YSoT10NU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00113

JSON explain

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