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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9039080d812c35cdbd6d26f283c92fd04e5318eb915e1a7843b8f85761138621' 
  AND token = 'cEqm6iv2/ZmDmiRA1ikqAoPtRqhLeGfclMyeIaJAolA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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