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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0eb69d725754e844fb2ae1b37f019829774c23ec00e4c89d6950df64469ed5e7' 
  AND token = '720eF8FqDeF9268QE/h8XDsSNJ4ANqAbkHnSsyp2wrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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