Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd2dfdef90efef1693ceaef7eaa218ded57a8c9741124d83cfa3eeff5a20a1b24' 
  AND token = 'pAKCz4RWptMRFtGPRX0SMfijvr5JC50iVbn+6ICzsRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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