Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7867b51c1573deccfbc6b6fdd9d13dec63555624882fea57516b66efb3ee6962' 
  AND token = 'eqI+Vp3i/p3onY8bCfckOYjyQilt9jABXSZSy/fsS9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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