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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22c56d6ea53c9e553cc3fee14f0530be7a5c4d6b3ccb6b4c7a8018b31e87fbc5' 
  AND token = 'nrC9tEmz5wsj2XxC5A6tTX0pTeEX14WLA0BRK96zbiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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