Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba46586929323557d15602aa348c2d1165f7dc08c7fd2bd065044cf4644ad7bb' 
  AND token = 'eGyqGSUgIrcWtXYSecs3KAkwVdND75s8kJu2j/h1d1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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