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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6005b8205b919e65f741e7a66f80086fcc1a2f67ece3a31b7bf859edbf92e7bd' 
  AND token = '1XVdnLNOJwcd52lapBl5IwCcR7sD0qMOfy5K87vFX2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00286

JSON explain

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