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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5aa02b09a28b9855724e834ed8b23a3f33fe5f41996e056241031ed22c9ff92f' 
  AND token = 'aCfQD1q4gfAgglRUmC52MeGEqB5fV+Go+RIc+jfRCYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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