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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b6d97c0615c1fc2e7cd31ad88164b97fe74fc704d76d5b3abe468e540bd2ebe' 
  AND token = 'VpKC766rsrk31GF7ogARXe2E+fMvvMaJoAvgOv179Ac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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