Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1c0fb3e3a2f5f442bc4b2a235edf2b596975ea0b46c5af48701b3a7f16c76679' 
  AND token = 'g7nSqKL+tJSV8EqS4jQ2SReKY5s2ReyhA7cJiUy427M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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