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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2209953977e510d64aeaefe56222466a56dc861420135bfd7c766a7ff5a8762d' 
  AND token = 'QGCxmfmyTX3hB4eB/UTaagwq27F/qZ8wu8Zn1uw6gUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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