Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a634cd6d86fe2779de155a92607cc45f43b60e30e107c91af65baf24ac09bccb' 
  AND token = 'i/CsQhKRB7QqsyZIO212N3JY2f4vpi2HNV6QfCmErWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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