Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e5634d734c73797dba2eed2fc76edc772959caaca65f51beb0608b783a35385' 
  AND token = '++SrEHHY3udJe7Ss8jEGLdjz2sMGr0wSAWI0HTQ83tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}