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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03e84a6df1f0850b5e0769e5706d64e945ebaa6699830885e75390c98f46fb3f' 
  AND token = 'jyGQSS7HNlXomDGr2Ey5U9Z4V3VW57Uuh2UkYobbTGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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