Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3316dea8006a6db20d5b1cd4ad969f39fc440cf349ed768e29ba1f4b15094cc3' 
  AND token = 'gfbbWYofUCYrGIforkSlmz6ILVj/ciIRU+f1HHXTsWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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